Warp-drawing machine



. 1,624,928- H. D. COLMAN WARP DRAWING MACHINE Ori led Jan. 8, 1923 j 2Sheets-Sheet 1 April. 19'. 1927.

April 19, coLMAN WARP DRAWING MACHINE 2 Sheets-Sheet 2 Original FiledJan. 8, 1923 Patented Apr. 19, 192.7.

uurrsn STATES r 1,624,928 Parana? OFFICE.

HOWARD D. GOLMAN, F ROCKFORD, ILLINOIS, ASSIGN'OR TO BARBEE COLMAN COM-PANY, OF ROCKFORD, ILLINOIS, CORPORATION OF ILLINOIS.

VAEP-IJBAvVING MACHINE.

flriginal application filed. January 8, 1623, Serial No. (511,214.Divided and this application filed June 4,

This application is a division of my application Serial No. 611,214:filed January 8, 1923, and relates particularly to reed-controlled meansfor feeding the mechanism carriage of a warp-drawing machine.

In the accompanying drawings,

Figure 1 is a fragmental rear view' of the left-hand end of awarp-drawing machine, that is to say, the end at which the mechanismcarriage starts.

Fig. 2 is a view upon an enlarged scale of a mechanism shown in thelower right-hand portion of Fig. 1.

Fig. 3 is a fragmental view of the reed showing the reed opener inengagement therewith.

Fig. 4 illustrates a yielding connection between the drive rod and thefeed pawl. arm.

In the accompanying drawings, 1 denotes the bed of the machine, 2 beingthe upright frame member at the lefthand end of the machine. Themechanism carriage 3 is arranged to travel upon ways provided there forupon the bed of the machine. A reed opener 4 is supported upon themechanism carriage in the usual or any preferred way. The reed openermay be of any desired character, that herein shown being substantiallysimilar to the one disclosed in Patent No. 871,680, dated November19,1907. The reed opener is somewhat in the form of a single-threadscrew which by its rotation aLlQCl-SSlVBly opens the dents ofthe reed byspreading the splits sufiiciently to permit the needle to pass throughthe dent.

The reed B may be supported in the warpdrawing machine in any suitablemanner. that herein shown being essentially the same as the constructionfully disclosed in Patent No. 1,169,087, dated January 18, 1916. Thereed is supported by means of clamps 5 attached to a bar 6 which isprovided with rollers 7 resting upon a rail 8 forming part of thestationary framework of the machine.

The means herein shown for driving the mechanism carriage 3longitudinally of the machine comprises a feed screw 12 engaging a nut13 on the mechanism carriage. The means for transmitting power to thefeed screw 12 is controlled by the reed, as will now be described.

Referring to Fig. 2, it will be seen that a main drive shaft 14 carriesat its left-hand Serial No. 118,605.

enda crank 15 to which connected a rod 16. The forward end of theconnecting rod 16 is attached to an arm 17, whereby rotation of thecrank 15 imparts oscillation to the arm 17, The arm 17 is pivotallymounted upon a stub shaft 18 supported by a bracket 19 attached to theouter side of the upright frame member 2. A ratchet (log 20 is pivotallymounted upon the arm 17 and is held in engagement with a ratchet wheel21 by means of a helically' coiled expansive spring 22. The ratchetwheel 21 is secured to the side of a spur gear wheel 23 which isrotatably mounted upon the stub shaft 18. The gear wheel 23 meshes witha pinion :Zet-wl'nch is fixed to the feed screw 12.

Means is provided for preventing the arm 17 from swlnging far enough .toallow the ratchet dog '20 to snap behind a tooth of the ratchet wheel 21when the relation of the drawing-in mechanism to the reed is such thatthe mechanism carriage need not be moved. Inasmuch as the connecting rod16 moves through an unvarying cycle, it is necessary to provide ayielding connection between said rod and the arm 17. One form ofyielding connection is illustrated in Fig. 4; wherein it will be seenthat the connecting rod 16 is provided with an elongated opening 25 fora pivot pin 26 on the arm 17. A block 27 slidably mounted in the opening 25 is held against the pivot pin 26 by means of a spring 28 and aplunger 29, the

pivot pin 26 at the forward end of the elongated opening 25 except whenthe oscillation of the arm 17 is interfered with.

The means for controlling the oscillation of the arm 17 comprises an arm30 rigid with the arm 17 The arm 30 is provided with a hardened steelplate 31 adapted to engage the lower end of a vertically-reciprocatedbar 32. The lower end of the bar is guided in a block 33 which issecured to the bracket 19. The upper end of the bar 32 is pivoted to anarm 3% which is pivotally supported in a bracket 35 secured to the endframe member 2. Rigid with the arm 34 is a crank arm 36 to which isconnected one end of a link 37. The other end of Said link is connectedto the bar 6. A helically coiled contractile spring 38 attached at onespring 28 being strong enough to keep the end to the bar 32 and at itsother to the bracket serves to counterbalance the weight of the bar 32and the bell crank 34t36, so that a light push or pull imparted to thelink 37 is suflicient to raise or lower the bar 32. The extent ofmovement of the bar 32 is limited by engagement of the crank arm 3 1-with stop pins 39 on the bracket 35.

In operation. if the mechanism carriage .3 travels toward the left (asviewed in Fifi. 1) faster than the reed opener tscrews its way throughthe reed. the reed will. be carried toward the left with the mechanismearriage, thereby causing: the bar 32 to be lowered into position tolimit the oscillation of the arm 30. thus preventing" the ratchet dos!20 from taking a tooth of the ratchet wheel 21, and thereby causingsuspension of the travel of the mechanism carriage. The continuingoperation of the reed opener t then causes the reed to travel toward theright- (as viewed in Fig. 1) whereby the bar raised out of the path ofmovement of the arm 30, and movement is again imparted to the mechanismcarriage. In this way, the travel of the mechanism is interrupted fromtime to time as may be necessary to adapt the feed movement of thecarriage to the sley of the particular reed being operated upon.

It will be apparent that the present invention obviates the necessity ofmanually adjusting the feed of the mechanism carriage to the sley of thereeds through which warps are to be drawn,

The present embodiment of the invention is especially designed forapplication to existing warp-drawing machines the parts of thecontrolling mechanism being so constructed that they may be readilyattached to existing machines.

I claim as my invention:

A warp-drawing machine having, in com" bination. a pivoted arm,yieldable' means for swingin said arm. a ratchet wheel pivoted on theaxis of said arm, a dog on said arm arranged to engage the ratchetwheel, a mechanism carriage, means driven by said ratchet wheel forfeeding the carriage, operating mechanism on said carriage, means formovably supporting a loom reed for engagement by said operatingmechanism, said reed beingfree to travel with said carriage, an armrigid with the first mentioned arm, a bar mounted for vertical movement,the lower end of said bar when lowered being arranged to limit theoscillation of said arms, counter-balancing means acting upon said bar,a hell crank lever to which the upper end of the bar is connected, andmeans rendering said bell crank lever sensitive to movement of saidreed.

In testimony whereof, I have hereunto atiixed my signature.

HOWARD D. GOLMAN.

